﻿// Copyright (c) 2008, Colin Burn
// All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// 
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// 
// * Neither the name of WTCL nor the names of its contributors may be
// used to endorse or promote products derived from this software
// without specific prior written permission.
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
// OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
// AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
// DAMAGE.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Media;

using WTCL.Charts.Axis.Data;
using WTCL.Charts.Axis.Interface;
using WTCL.Charts.Axis.Scale;
using WTCL.Charts.Axis.Ticks;
using WTCL.Data.Series;
using WTCL.Data.Series.Interface;
using WTCL.Data.Type;

namespace WTCL.Charts.Axis.Area
{
    internal class XAxisArea<TValueType, TSpanType, TSeries, TData, TChart, TChartCanvas> : BaseAxis<TChartCanvas>
        where TSeries : SeriesBase<TData>, ISampleXAxisSeries<IDataType<TValueType, TSpanType>>
        where TChart : Chart<TSeries, TData, TChart, TChartCanvas>
        where TChartCanvas : BaseChartCanvas<TSeries, TData, TChart, TChartCanvas>, IXAxisTickMarks<AxisScale<TChart, ValueAxisData<TValueType, TSpanType>, XAxisTick>>
    {
        internal override TChartCanvas ChartCanvas
        {
            get
            {
                return base.ChartCanvas;
            }
            set
            {
                base.ChartCanvas = value;

                this.ChartCanvas.XInvalidate += new EventHandler(OnXAxisDataInvalidate);
            }
        }

        private void OnXAxisDataInvalidate(object sender, EventArgs e)
        {
            InvalidateMeasure();
            InvalidateVisual();
        }

        protected override Size MeasureOverride(Size constraint)
        {
            List<List<XAxisTick>> axisTicks = this.ChartCanvas.XAxisScale.TickMarks;

            double height = 0;
            for (int i = 0; i < axisTicks.Count; ++i)
            {
                if (axisTicks[i] != null)
                {
                    foreach (XAxisTick tick in axisTicks[i])
                    {
                        if (tick != null)
                        {
                            height = Math.Max(height, tick.FormattedText.Height);
                        }
                    }
                }
            }

            return new Size(0, height + 10);
        }

        protected override void OnRender(DrawingContext drawingContext)
        {
            List<List<XAxisTick>> axisTicks = this.ChartCanvas.XAxisScale.TickMarks;

            for (int i = 0; i < axisTicks.Count; ++i)
            {
                if (i == this.ChartCanvas.Chart.ActiveSeries)
                {
                    if (axisTicks[i] != null)
                    {
                        foreach (XAxisTick tick in axisTicks[i])
                        {
                            Point origin = new Point(tick.Location - tick.FormattedText.Width / 2, 10);
                            drawingContext.DrawText(tick.FormattedText, origin);
                        }
                    }
                }
            }

            base.OnRender(drawingContext);
        }
    }
}
